驱动开发，涉及了调用门，中断门，任务门，和陷阱门等等，特别是对调用门的讲解，因为可以实现内核权限的切换。常用于黑客编程。-Driven development, involving a call gate, interrupt gate, task gate, and trap doors, etc., especially on the door called to explain, because you can achieve core competence of the switch. Hackers commonly used in programming.